Cited by 129Cannabis and Cannabinoid ResearchParkinson's Disease Mechanisms and TreatmentsNeurological disorders and treatments

Cannabidiol as a Therapeutic Target: Evidence of its Neuroprotective and Neuromodulatory Function in Parkinson’s Disease

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Patricio, Felipe, Morales-Andrade, Alan Axel, Patricio-Martínez, Aleidy, Limón, Ilhuicamina Daniel·2020·Frontiers in Pharmacology

Abstract

The phytocannabinoids of Cannabis sativa L. have, since ancient times, been proposed as a pharmacological alternative for treating various central nervous system (CNS) disorders. Interestingly, cannabinoid receptors (CBRs) are highly expressed in the basal ganglia (BG) circuit of both animals and humans. The BG are subcortical structures that regulate the initiation, execution, and orientation of movement. CBRs regulate dopaminergic transmission in the nigro-striatal pathway and, thus, the BG circuit also. The functioning of the BG is affected in pathologies related to movement disorders, especially those occurring in Parkinson’s disease (PD), which produces motor and non-motor symptoms that involving GABAergic, glutamatergic, and dopaminergic neural networks. To date, the most effective medication for PD is levodopa (l-DOPA); however, long-term levodopa treatment causes a type of long-term dyskinesias, l-DOPA-induced dyskinesias (LIDs). With neuromodulation offering a novel treatment strategy for PD patients, research has focused on the endocannabinoid system (ECS), as it participates in the physiological neuromodulation of the BG in order to control movement. CBRs have been shown to inhibit neurotransmitter release, while endocannabinoids (eCBs) play a key role in the synaptic regulation of the BG. In the past decade, cannabidiol (CBD), a non-psychotropic phytocannabinoid, has been shown to have compensatory effects both on the ECS and as a neuromodulator and neuroprotector in models such as 6-hydroxydopamine (6-OHDA), 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP), and reserpine, as well as other PD models. Although the CBD-induced neuroprotection observed in animal models of PD has been attributed to the activation of the CB1 receptor, recent research conducted at a molecular level has proposed that CBD is capable of activating other receptors, such as CB2 and the TRPV-1 receptor, both of which are expressed in the dopaminergic neurons of the nigro-striatal pathway. These findings open new lines of scientific inquiry into the effects of CBD at the level of neural communication. Cannabidiol activates the PPARγ, GPR55, GPR3, GPR6, GPR12, and GPR18 receptors, causing a variety of biochemical, molecular, and behavioral effects due to the broad range of receptors it activates in the CNS. Given the low number of pharmacological treatment alternatives for PD currently available, the search for molecules with the therapeutic potential to improve neuronal communication is crucial. Therefore, the investigation of CBD and the mechanisms involved in its function is required in order to ascertain whether receptor activation could be a treatment alternative for both PD and LID.

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  • CBD has numerous therapeutic effects including treatment of anxiety, pain, nausea, and motor deficits including tremor in Parkinson's disease.

    “CBD is the non-psychotropic component of marijuana, and there are numerous therapeutic effects of this drug including treatment of anxiety, pain, nausea, and motor deficits including the tremor in Parkinson’s disease [116].”
  • CBD has neuromodulatory and neuroprotective effects through mechanisms including blocking neuroinflammation, potentiating anti-inflammatory pathways, improving mitochondrial function, GABAA agonist potentiation, stimulation of 5HT1A receptors, and enhancing levels of anandamide.

    “CBD has both neuromodulatory and neuroprotective effects through a number of mechanisms including blocking neuroinflammation and potentiating anti-inflammatory pathways, improving mitochondrial function, GABAA agonist potentiation, stimulation of 5HT1A receptors, and enhancing levels of anandamide (AEA) [116–119].”

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  1. Rascol O. Fabre N. Brefel-Courbon C. Ory-Mange F. Perez-Lloret S. (2010). “ Dyskinesias,” in Encyclopedia of movement disorders. Editors Kompoliti K. Verhagen L. (New York, NY: Elsevier Academic Press), 350– 361.

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Authors
Patricio, F., Morales-Andrade, A. A., Patricio-Martínez, A., & Limón, I. D.
Affiliations
Benemérita Universidad Autónoma de Puebla (MX)
Corresponding author
Limón, Ilhuicamina Daniel
Venue
Frontiers in Pharmacology
Published
2020-12-15
Volume
11
Pages
595635-595635
ISSN
1663-9812 (ISSN-L)
OpenAlex
W3112818719
Cited by
129
References
240
Citations by year
2026: 11 · 2025: 21 · 2024: 21 · 2023: 35 · 2022: 30 · 2021: 11
FWCI
2.49
Type
journal article
Language
en
Open access
Locations
  • Frontiers in Pharmacology (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Consejo Nacional de Ciencia y Tecnología (2019-2020)
  • Benemérita Universidad Autónoma de Puebla (VIEP-BUAP 2019)
Topics
  • Health Sciences › Medicine › Pharmacology › Cannabis and Cannabinoid Research
  • Health Sciences › Medicine › Neurology › Parkinson's Disease Mechanisms and Treatments
  • Health Sciences › Medicine › Neurology › Neurological disorders and treatments
Keywords
cannabidiol, Parkinson's disease, neuroprotection, neuromodulation, endocannabinoid system, basal ganglia, nigrostriatal pathway, CB1 receptor, CB2 receptor, TRPV1 receptor, PPARγ, GPR55, GPR3, GPR6, GPR18, GPR30, GPR31, GPR34, GPR35, GPR37, GPR39, GPR40, GPR41, GPR

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